Carbureter.



\ v 2 o. L. BASTIAN y GARBURETBRJ `speed of the engine.

l l, I l

UNTTED sTATEs PATENT onirica.

. I' CHARLES L. BASTIALN, OF CHICAGO, ILLINOIS.

CARBURETER.

Application lled September 6,l 1910. Serial No. 580,478.

To all whom t may concern.' i f Be it known that I, CHARLES LaBAs'rfAN, al citizen of the United States, residing at Chicago, in the countyof Cook and State of Illinois, have invented certain new and `usef ul Improvements in Carbureters. of which carbureters, and to produce -a `simple andl efficient device of this character adapted' to operate satisfactorily and produce a? propry erly proportioned mixture regardless" of the One of the objects of this invention is the provisionv of mechanism under the, control of the throttle for automaticallyregulating the admission of air toy the carbureting' chamber so that the proper relation between the amount of air and `liquid drawn into` the chamber will be maintained to produce a Iproperly proportioned combustive mixture under all circumstances.

Additional objects and advantages'of my invention will become apparent as it is better understood by reference to the following description when taken in connection with the accompanying drawing, throughout the various4 views of which like reference characters referto similar parts.`

` On the drawing Figure 1 is a partial side elevation of a carbureter showing a preferred embodiment of my invention; F ig. 2 is an end elevation looking toward the right of Fig. 1; and -Fig. 3 is a` partial sectional view on the line 3 3 of Fig. `2.

The carbureter is designated generally in 'i Fig. 1 by the `reference character 10, and has Y a carbureting chamber 11 provided with a radial angev12 adapted to be connected by 'bolts 13 with the flange 12 of a mixture supply pipe 14 which constitutes a mixture outlet fo-r the carbureter, and for the pur-V pose of insuring a tight fit between the flanges a packing ring 15 is usually inserted between them. The carbureter bowl 1,6 is

disposed beneath the carburetingchamber.

A spray nozzle 17 'of any preferred type is mounted in the carbureter bowl, and a needle valve 18 projects into the nozzle for regulating the size of the discharge opening therein.

An air intake supply pipe 19 is connected with the lower side of the carbureter bowl Specficatidn of Letters Patent. l

Patented May 27, 1913.

.16, and a spider 20 is disposed across the intake to the bowl. Above the spider a valve seat 21 is provided against which the valve disk 22 is adapted to 4seat to close the -a1r intake and shut off thesupply of air.

The valve disk is loosely mounted on a stem 23 .which is guided at its lower end in the sp1der'20, and is guided above the valve disk by the sleeve 24 which is threaded into a cap 25 of the bowl. An annular shoulder or disk 26 is rigidly secured upon the valve stem within the cap 25, and an expansion spring 27 surrounds the stem between said shoulder and the valve disk, and normally maintains the disk against its seat 2l. The sleeve 24 is capable of longitudinal adjustment by threading it in or out of the cap 25 to adjust the position of the annular shoulder 26 to thereby adjust the tension of the spring 27.

In carbureters heretofore employed an adjustment similar to the adjustment of the sleeve 27 as above described has been employed to regulate the tension of the "air intake valve controlling spring for the purpose of supplying air to the carbureter. It has been found, however, that the constant tension upon the air valve controlling spring when an engine is running at various speeds does not give satisfactory results for the reason that when the throttle is opened wider to admit a larger quantity of explosive mixture to the cylinders at each reciprocatio-n of the 'pistons the air intake valve will be opened wider against the constant force of the controllingspring because of the increased vacuum in the carbureter chamber resulting from the opening of the throttle. The obvio-us result of increasing the supply of air to the carbureter as the engine speeds up while the liquid supply remains constant is to increase thel proportion of air in relation to the amount of liquid in the mixture thereby producing an inefficient mixture and a consequent reduction of power yin the engine. I have obviated this objectionable feature heretofore -present in carbureters of this type by the employment of mechanism for increasing the tension of the valve controllingl spring proportionately to the opening of the throttle thereby maintaining the air supply constant and securing at all times a mixture of the proper proportions regardless of the speed at which the engine may be running. This mechanism as shown on the drawing comprises 'a bracket Qrstandard 28 which is Secured in POSition on the sleeve 24. by a pin 29, the said standard being forked as shown in Fig. 2. A cam 30 is pivotally mounted on a bolt 31 in the upper nd of the forked standard. This cam is adapted to engage a bearing cap 32 mounted upon the upper end of the valve stem 23. A lever 34 secured to the cam extends outwardly and downwardly, and is attached at its lower end to one end of a link 35, which is connectedl at 36 with an operating rod 37. This oper- Yating rod 37 is the usuall throttle valve conf trolling rod and may be manipulated by the operator by any suitable or Ipreferred type of controller. It will be evident that as the operating rod is movedlongitudinally the cam 30 will be oscillated on its ,pivot to force the valve stem carrying the shoulder 26 downwardly to increase the tension on the spring 27. f

A throttle valvel or disk 38 carried by a shaft 39 is mounted in the mixing chamber 11, and is adapted to control the supplyof mixture to the cylinders. The throttle lever 40 (Fig. 1) is rigidly'secured to the outer end of the throttle shaft and is at: tached to the throttle operating rod lat 36.

f The casing. of the mixing chamber is provided with a laterally extending stud 41 into which is threaded an abutment screw 42 by means of which the ultimate closing posiion of the throttle valve may be reguate I n y -The operation of the air intake valve regulating mechanism is as follows :l When the throttle operating rod 37 is moved to the right viewing Fig. 1,-the throttle Idisk will be `rot-ated toward a vertical position. and

simultaneously through the link l35 and 'the lever l34, the pivoted cam 30 will be rotated ln a' counter-clockwise direction looking at Figs. 1 and 2,.thus depressing the valve st em 23 carrying the shoulder 26 and increasing the tension of the intake valve controllingr spring 27. As the throttle disk lis moved more nearly toa vertical' position the tension on the spring 27 is proportionately in-` creased so that' the volume of air drawn into the mixing chamber past the intakel valve p at each reciprocationof the piston will be maintained constant to produce-a combustive mixture of proper proportions regarde less of the rapidity with which the pistons` reciprocate. l

While I have described in detail the particular embodiment of my invention which I have selected for the purposes of illustration in this application,` it will be under` stood that the invention is capabley of considerable variation in the construction and arrangement of the various-parts' without de parting from the essence 'of the"inventionor in any way sacricing any of the material 65 Iadvantages thereof. v

1f l 1. In a carbureter, the combinatlon of a Loeass What I desire to claim is:

lthrottle disk disposed across the mixture outlet of the carbureting chamber, an airlintakevalve disk, a stem uponfwhich said fdisk is loosely mounted,l a shoulder on said stem, aV spring surrounding 'said stem between said shoulder and said valve disk, and connections between said valve stem and the throttle disk whereby the tension of said spring will be increased proportionately to the opening of said throttle disk.

\2. In a carbureter, the combination of a throttle disk disposed 'across the mixturev outlet of the carbureting chamber, an airintake valve disk, a stem upon which said valve disk is loosely mounted, a shoulder on y said'stem, a vspring interposed between said shoulder and said .valve disk, a pivotally mounted cam disposed outside the valve chamber`and'a connection between said cam and said throttle disk whereby said cam will be actuated to depress the valve` stem and increase the tension of the air-intake valve disk 'controlling spring proportiontelly -to the op'eningof the throttle valve I 3. In a carbureter, the combination'of an air-intakeI valve disk, a valve stem upon which said vvd -isk is loosely mounted, a shoul der on said stem, a spring. interposed bef tween said shoulder and said valve disk, an adjusting screw for adjusting the normal tension of said spring, a cam pivotally mounted in position to engage the outer end of said valve stem, a' throttle disk, and operating means -connected to said throttle disk and to said cam -`for vsimultaneously openingthethrottle disk andlincreasing the tension o -said spring.

4. In a carbureter, thecombination of av carbureting chamber, an air-intake valve, a mixture outlet, a throttle valve disposed in said mixture outlet, and means for increasing the resistance to the opening of the airintake valve proportionately to the amount` of opening of the throttle valve.

Vpressing said air-intake valve upon'its seat,

av throttle valve controlling the admission of the mixture to said outlet, andmeans for'- simultaneously opening said throttle valve and increasing the pressure of the said 'spring upon the said air-intake valve.

7. In a carbureter, the combination ofv an air-intake valve, a mixture outlet, a' spring 13o pressing said-air-intake valve upon its seat,

a throttle Valve controlling the admission f the mixture 4to the said outlet, manual y controlled I'neans for operating said thr t-A tle Valve, connections between .said mea s and said spring whereby the'pressure of tj e Asaid spring upon the air-intake` valve is `1n- CHARLES L. BASTIAN.

Witnesses t v I; J. WILSON, HENRY M, HUXLEY. 

